diff --git a/common/script/content/spells.js b/common/script/content/spells.js
index 9381ba89d5..a4632dbea4 100644
--- a/common/script/content/spells.js
+++ b/common/script/content/spells.js
@@ -396,7 +396,10 @@ spells.special = {
 
       if (!target.items.special.nyeReceived) target.items.special.nyeReceived = [];
       target.items.special.nyeReceived.push(user.profile.name);
+
+      if (!target.flags) target.flags = {};
       target.flags.cardReceived = true;
+
       user.stats.gp -= 10;
     },
   },
@@ -421,7 +424,10 @@ spells.special = {
 
       if (!target.items.special.valentineReceived) target.items.special.valentineReceived = [];
       target.items.special.valentineReceived.push(user.profile.name);
+
+      if (!target.flags) target.flags = {};
       target.flags.cardReceived = true;
+
       user.stats.gp -= 10;
     },
   },
@@ -445,7 +451,10 @@ spells.special = {
 
       if (!target.items.special.greetingReceived) target.items.special.greetingReceived = [];
       target.items.special.greetingReceived.push(user.profile.name);
+
+      if (!target.flags) target.flags = {};
       target.flags.cardReceived = true;
+
       user.stats.gp -= 10;
     },
   },
@@ -470,7 +479,10 @@ spells.special = {
 
       if (!target.items.special.thankyouReceived) target.items.special.thankyouReceived = [];
       target.items.special.thankyouReceived.push(user.profile.name);
+
+      if (!target.flags) target.flags = {};
       target.flags.cardReceived = true;
+
       user.stats.gp -= 10;
     },
   },
@@ -492,9 +504,13 @@ spells.special = {
           u.achievements.birthday++;
         });
       }
+
       if (!target.items.special.birthdayReceived) target.items.special.birthdayReceived = [];
       target.items.special.birthdayReceived.push(user.profile.name);
+
+      if (!target.flags) target.flags = {};
       target.flags.cardReceived = true;
+
       user.stats.gp -= 10;
     },
   },
diff --git a/website/client/js/services/chatServices.js b/website/client/js/services/chatServices.js
index a79de22b85..4020c9dd92 100644
--- a/website/client/js/services/chatServices.js
+++ b/website/client/js/services/chatServices.js
@@ -70,6 +70,10 @@ angular.module('habitrpg')
       });
     }
 
+    function clearCards () {
+      User.user._wrapped && User.set({'flags.cardReceived':false});
+    }
+
     return {
       getChat: getChat,
       postChat: postChat,
@@ -80,8 +84,4 @@ angular.module('habitrpg')
       markChatSeen: markChatSeen,
       clearCards: clearCards,
     }
-
-    function clearCards() {
-      User.user._wrapped && User.set({'flags.cardReceived':false});
-    }
   }]);
diff --git a/website/server/controllers/api-v3/chat.js b/website/server/controllers/api-v3/chat.js
index 7be628f0df..7738189b6f 100644
--- a/website/server/controllers/api-v3/chat.js
+++ b/website/server/controllers/api-v3/chat.js
@@ -327,8 +327,9 @@ api.seenChat = {
     let validationErrors = req.validationErrors();
     if (validationErrors) throw validationErrors;
 
-    let group = await Group.getGroup({user, groupId});
-    if (!group) throw new NotFound(res.t('groupNotFound'));
+    // Do not validate group existence, it doesn't really matter and make it works if the group gets deleted
+    // let group = await Group.getGroup({user, groupId});
+    // if (!group) throw new NotFound(res.t('groupNotFound'));
 
     let update = {$unset: {}};
     update.$unset[`newMessages.${groupId}`] = true;